1 ; RUN: llc < %s -march=arm | FileCheck %s 2 3 define i64 @f1(i64 %a, i64 %b) { 4 ; CHECK-LABEL: f1: 5 ; CHECK: subs r 6 ; CHECK: sbc r 7 entry: 8 %tmp = sub i64 %a, %b 9 ret i64 %tmp 10 } 11 12 define i64 @f2(i64 %a, i64 %b) { 13 ; CHECK-LABEL: f2: 14 ; CHECK: adc r 15 ; CHECK: subs r 16 ; CHECK: sbc r 17 entry: 18 %tmp1 = shl i64 %a, 1 19 %tmp2 = sub i64 %tmp1, %b 20 ret i64 %tmp2 21 } 22 23 ; add with live carry 24 define i64 @f3(i32 %al, i32 %bl) { 25 ; CHECK-LABEL: f3: 26 ; CHECK: adds r 27 ; CHECK: adc r 28 entry: 29 ; unsigned wide add 30 %aw = zext i32 %al to i64 31 %bw = zext i32 %bl to i64 32 %cw = add i64 %aw, %bw 33 ; ch == carry bit 34 %ch = lshr i64 %cw, 32 35 %dw = add i64 %ch, %bw 36 ret i64 %dw 37 } 38 39 ; rdar://10073745 40 define i64 @f4(i64 %x) nounwind readnone { 41 entry: 42 ; CHECK-LABEL: f4: 43 ; CHECK: rsbs r 44 ; CHECK: rsc r 45 %0 = sub nsw i64 0, %x 46 ret i64 %0 47 } 48 49 ; rdar://12559385 50 define i64 @f5(i32 %vi) { 51 entry: 52 ; CHECK-LABEL: f5: 53 ; CHECK: movw [[REG:r[0-9]+]], #36102 54 ; CHECK: sbc r{{[0-9]+}}, r{{[0-9]+}}, [[REG]] 55 %v0 = zext i32 %vi to i64 56 %v1 = xor i64 %v0, -155057456198619 57 %v4 = add i64 %v1, 155057456198619 58 %v5 = add i64 %v4, %v1 59 ret i64 %v5 60 } 61
